Thomas donahue



(ModeL) T. DO'NA'HUE.

'PADLOGK.

No. 269,646. 7 Patented Dec. 26, 1882-.

Fly. 1, R512 WITNESSES n INVENTOR M flb ATTORNEYS.

UN TED STATES PATENT Cerise.

THOMAS DONAHUE, OF TERRYVILLE, OONNEOTLOUT, ASSIGNOR TO THE EAGLE LOCK COMPANY, OF SAME PLACE.

APADLOCK.

SPECIFICATION forming part of Letters Patent No. 269,646, dated December 26, 1882.

- Application filed September 2, 1881". (Modem To all whom it may concern Be it known that l, THOMAS DONAHUE, of Terryville,in the county of Litchfield and State of Connecticut, have invented certain new and useful Improvements in Padlocks, of which the following is a'i'ull, clear, and exact description.

My invention consists in certain novel fca iures of construction, and in combinations of mechanisms having the object to furnish a padlock of simple and durable construction, and one that cannot be picked, as more fully set forth hereinafter.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure l is a side or face view of my improved lock with the cap-plate removed, showing the parts in the locked position. Fig. 2 is a similar view, showing the parts in the unlocked position. Fig. 3 is a sectional perspective view of the slide-block. Fig. 4 is a sectional perspective view of the locking-bolt for the shackle. Fig. 5 is the key.

A is the case or shell for receiving the mechanism, provided with two or more suitably-located rivets, a, by which the cap-plate is so cured.

B is the shackle, pivoted upon one of the rivets a; and O are the tumblers, also fitted upon one of the rivets a, so as to be capable of a rocking movement.

I) is the key-slot in the bottom of the case A, the key being of the flat form shown in Fig. 5.

D is the locking-bolt of the shackle, fitted for endwise movement, and formed at its forward end for engaging the notch c in the end of the shackle B.

E is a-sliding block fitted at one side of the case A for movement to and'from the shackleaperture, between the fixed stud (Z and the forward end of the bolt D.

e is a spiral spring fitted in a-recess at the under side of the block E, and taking against the stud (I, this spring serving to project the block E outward.

f is a pawl or dog fitted in a recess interiorly of the bolt D, and formed at its forward end, as shown most clearly in Fig. 4, with a beveled lug, f, for engaging the notches g, formed in the tumblers C.

It is a spring bearing upon the heel of the pawl f, so as to serve for projection of the bolt D, and also to move the forward end of the dog or pawl downward.

i is the tumbler-spring.

7t is-a flat spring riveted upon the top of the case A, and having its free end extending beneath the pivoted end of the shackle B, so that the spring shall exert its force to throw the shackle up.

In thelocked position 0ftheshackle,asshown in Fig. 1., it is retained by the locking-bolt D, and the sliding block E is held in its inward position by the end of the shackle. To release the shackle the key is inserted, and the key turning the tumblers, the notches g are brought into line beneath the pawlf, so that the pawl falls into the notches. By further movement of thekey the tumblers engaging the pawlcarry the bolt-D backward, thereby releasing the shackle, which is immediately thrown up by the spring 7:. The block E, being released by the shackle, rises, and its corner, passing in front of the bolt D, serves to hold the bolt backward. The block E is notched for engagement with the bolt D, so that at the same A down and the bolt springs forward and locks the shackle. In this locked position the pawl f is raised by the tumblers, and the upper side of the pawl engages a notch, m, in the case A, so that the pawl serves to lock the bolt D.

It will be seen that the locking-boltis moved by the tumblers through the medium of the pawl f, the pawl also serving to lock the bolt in its forward position. The bolt cannot be forced back by a strain upon the shackle, and no downward movement of the pawl being possible until the notches of the tumblers are in line, there is nothing to guide the operator in picking the lock. The sliding block, by bolding the bolt in position, allows the withdrawal of the key as soon as the shackle flies upward. This lock may be constructed for being operated by a turning key instead of a sliding" key, as shown.

, Having thus fully described my invention, I

ICC

claim as new and desire to secure by Letters Paten t-- tumblers (J, pressed by the spring 'i, whereby when the bolt is moved forward to engage the shackle the upper end of the pawl will pass into the notch m and lock the bolt, as (lei scribed.

4. The combination of the pawlfand spring h with the locking-bolt D, the sliding block E, and swinging shackle B, substantially as shown and described.

1. The combination, with the slide-bolt D and pawl j", pivoted thereto, of the spring h, arranged to bear upon the heel of pawl, whereby it both forces the front end of pawl down and projects the bolt, as described.

2. The combination, with the bolt 1), of the pawlf, pivoted thereto, and having a beveled l lug, f, the spring It, and the spring-pressed 1 tumblers 0, having notches {1, whereby the key may operate through the tumblers and THOMAS DONAHUE. pawl to throw back the bolt, as described. Witnesses:

3. The combination of the case A, having 5 H. B. PLUMB, notch m, the pivoted spring-pawl f, and the i t. J. PLUMB. 

